71210515338 has 32 divisors (see below), whose sum is σ = 163350289920. Its totient is φ = 22971133440.

The previous prime is 71210515291. The next prime is 71210515339. The reversal of 71210515338 is 83351501217.

It is a happy number.

71210515338 is a `hidden beast` number, since 7 + 12 + 105 + 1 + 533 + 8 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71210515339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21267895 + ... + 21271242.

It is an arithmetic number, because the mean of its divisors is an integer number (5104696560).

Almost surely, 2^71210515338 is an apocalyptic number.

71210515338 is an abundant number, since it is smaller than the sum of its proper divisors (92139774582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71210515338 is a wasteful number, since it uses less digits than its factorization.

71210515338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42539179 (or 42539173 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 71210515338 in words is "seventy-one billion, two hundred ten million, five hundred fifteen thousand, three hundred thirty-eight".